Cummins ISB CM850 (2003-06) Fault Code: 2366 PID: SID 28 SPN: 1072 FMI: 3 Engine Brake Actuator Circuit #1 – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 1 signal circuit. Possible causes: 1)Open circuit in the engine harness, brake harness, or engine brake solenoids2)Short to voltage source in the engine harness3)Failed ECM. Possible repairs: 1)Replace the engine brake solenoid.2)Replace the ECM.3)Repair or replace the engine harness. Cummins ISB CM850 (2003-06) Fault Code: 2363 PID: SID 29 SPN: 1073 FMI: 4 Engine Brake Actuator Circuit #2 – Voltage...

Cummins ISB CM850 (2003-06) Fault Code: 2367 PID: SID 29 SPN: 1072 FMI: 3 Engine Brake Actuator Circuit #2 – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 2 signal circuit. Possible causes: 1)Open circuit in the engine harness, brake harness, or engine brake solenoids2)Short to voltage source in the engine harness3)Failed ECM. Possible repairs: 1)Replace the engine brake solenoid.2)Replace the ECM.3)Repair or replace Cummins ISB CM850 (2003-06) Fault Code: 2366 PID: SID 28 SPN: 1072 FMI: 3 Engine Brake Actuator Circuit #1 – Voltage Above Normal or...

Cummins ISB CM850 (2003-06) Fault Code: 237 PID: SID 30 SPN: 644 FMI: 2 External Speed Command Input (Multiple Unit Synchronization) – Data Erratic, Intermittent, or Incorrect. The throttle input signal to the primary or secondary engine for multiple unit synchronization is less than 3 percent or more than 97 percent. The J1939 datalink connections are part of the OEM harness. Location of the J1939 harness will vary by the OEM. Refer to the OEM manual for specific component location. The configuration of the three pins inputs to the electronic control module (ECM) on the OEM harness determines if an...

Cummins ISB CM850 (2003-06) Fault Code: 2373 PID: 95 SPN: 1209 FMI: 3 Exhaust gas pressure sensor circuit – shorted high. High voltage detected at the exhaust gas pressure sensor circuit. The exhaust gas pressure sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to become active. Possible causes: 1)Signal wire shorted to sensor supply or battery voltage2)Open return circuit in the engine harness, connectors, or sensor. Possible repairs: 1)Replace the exhaust gas pressure sensor.2)Repair or replace the engine harness.3)Replace the ECM. Cummins ISB...

Cummins ISB CM850 (2003-06) Fault Code: 2374 PID: 95 SPN: 1209 FMI: 4 Exhaust gas pressure sensor circuit – shorted low. Low voltage detected on the exhaust gas pressure sensor exhaust circuit. The exhaust gas pressure sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to become active. Possible causes: 1)Signal wire open or shorted to ground in the harness2)Supply line open or shorted to ground3)Sensor shorted to ground. Possible repairs: 1)Replace the exhaust gas pressure sensor.2)Repair or replace the engine harness.3)Replace the ECM....